This gearmotor is a miniature medium-power, 6 V brushed DC motor with a 51.45:1 metal gearbox. It has a cross section of 10 × 12 mm, and the D-shaped gearbox output shaft is 9 mm long and 3 mm in diameter.
Key specs at 6 V: 420 RPM and 40 mA with no load, 12 oz-in (0.9 kg-cm) and 0.7 A at stall.
These tiny brushed DC gearmotors are available in a wide range of gear ratios—from 5:1 up to 1000:1—and with five different motors: high-power 6 V and 12 V motors with long-life carbon brushes (HPCB), and high-power (HP), medium power (MP), and low power (LP) 6 V motors with shorter-life precious metal brushes. The 6 V and 12 V HPCB motors offer the same performance at their respective nominal voltages, just with the 12 V motor drawing half the current of the 6 V motor. The 6 V HPCB and 6 V HP motors are identical except for their brushes, which only affect the lifetime of the motor.
The HPCB versions (shown on the left in the picture below) can be differentiated from versions with precious metal brushes (shown on the right) by their copper-colored terminals. Note that the HPCB terminals are 0.5 mm wider than those on the other micro metal gearmotor versions (2 mm vs. 1.5 mm), and they are about 1 mm closer together (6 mm vs. 7 mm).
Data sheet
Manufacturer BTC Korporacja sp. z o. o. Lwowska 5 05-120 Legionowo Poland sprzedaz@kamami.pl 22 767 36 20
Responsible person BTC Korporacja sp. z o. o. Lwowska 5 05-120 Legionowo Poland sprzedaz@kamami.pl 22 767 36 20
50:1 Micro Metal Gearmotor with Extended Motor Shaft
 No product available!
A small, low-power motor with a 5:1 metal gear, 6 V operating voltage, 0.02 A to 0.36 A power consumption, 2500 RPM speed and a maximum torque of 0.05 kg * cm. Pololu 1100
Small motor with metal gear and encoder, rotation speed 1000 RPM, operating voltage 6 V. GA46-N20E-0050
 No product available!
A small medium power motor with 210:1 metal gear, 6 V operating voltage, 0.04 A to 0.67 A power consumption, 100 RPM speed and a maximum torque of 1.7 kg*cm. Pololu 2369
 No product available!
Small metal gear motor, rotation speed 136 RPM, operating voltage 6 V. GA1024-N20F-0037
Pololu high power miniature motor with carbon brushes. 380:1 gear motor, shaft speed 85 rpm, torque 5kg*cm. The motor has an extended shaft, which makes it easy to attach the encoder. Pololu 4799
 No product available!
A small medium-power motor with a 1000: 1 metal gear, 6 V operating voltage, 0.04 A to 0.67 A power consumption, 22 RPM, a maximum torque of 6.5 kg * cm and a double-sided shaft. Pololu 3059
 No product available!
This gearmotor is a miniature high-power, 6 V brushed DC motor with long-life carbon brushes and a 210.59:1 metal gearbox. It has a cross section of 10 × 12 mm, and the D-shaped gearbox output shaft is 9 mm long and 3 mm in diameter. This version also has a 4.5 × 1 mm extended motor shaft.
75:1 Micro Metal Gearmotor HP with Extended Motor Shaft
 No product available!
DC Micro motor module with metal gear with a gear ratio of 30:1. The motor is connected to the board containing the driver. DFRobot DFR0399
A small, low-power motor with a 5:1 metal gear, 6 V operating voltage, power consumption from 0.02 A to 0.36 A, speed 2500 RPM, maximum torque of 0.05 kg*cm and double-sided shaft. Pololu 2200
 No product available!
Miniature high-power motor from the Pololu MP series. Gear motor 5: 1, 
the rotational speed of the shaft is 4400 rpm, the torque is 0.1 kg * cm (0.01 Nm). 
The motor has an extended shaft which makes it easy to attach the encoder. Pololu 2376
 No product available!
30:1 Micro Metal Gearmotor HP with Extended Motor Shaft
 No product available!
 No product available!
                    Miniature medium-power, 6 V brushed DC motor with a 51.45:1 metal gearbox. It has a cross section of 10 × 12 mm, and the D-shaped gearbox output shaft is 9 mm long and 3 mm in diameter. Pololu 2365